If you’ve got the TT and PIC from the military, then frankly, you may not want to spend the time and money at these fairs. Once your apps and resume are tight, focus on getting your internal recommendations, and have them get you your “in” to HR. Fairs are great for general info about the companies and maybe good if you don’t know anyone that works there. However, if you already have connections, then save the money and leverage your connections. For example, if applying to DAL, have a buddy email HR to review your App, for UAL, have a buddy set up a meeting with a chief pilot, (same concept for others) etc. This will prove much more effective and save you time, travel, and conference fees.